KR102337212B1 - Smart glass device using hologram optical element - Google Patents

Abstract

The present invention relates to a smart glass device using a holographic optical element, which is manufactured as a see-through type that can acquire an image while securing an external view, and uses only a wavelength predefined in the holographic optical element (HOE). The HOE image display unit composed of a wavelength-selective transparent reflector made in the form of a film by recording asymmetrical reflection to match the center of the eye is placed in parallel with the eye. Displayed as a converged image for viewing, after condensing the output light of three laser diodes arranged to output red light, green light, and blue light, respectively, with a collimation taper, a flat plate optical induction mixer (PLC; Plane Lightguide Combiner) Combined to form a single point light source at the end along the optical waveguide, and then, through a Collimation Lens, a single point light source is combined with a parallel point light source with a constant size at any distance without an angle of expansion. A point light source emitting unit for outputting as a light source for emitting the above-described incident light signal is used.
According to the present invention, if the HOE image display unit is composed of a wavelength selective transparent reflector manufactured in the form of a film laminated or adhered on an aspherical lens using a hologram optical element (HOE), the HOE image display unit is a flat lens for HMD or a spectacle type monitor (GTM). ), when used by laminating or adhering to the curved lens, when the user sees the outside through the HOE image display unit, all the light input from the surroundings is transmitted through it and the transparency is increased so that the user can see the outside very clearly. In particular, according to the present invention, the output light of three laser diodes arranged to output red light, green light, and blue light, respectively, passes through the condensing attenuator and then passes along the optical waveguide inside the flat plate light-guided mixer. can be shortened to minimize light loss.

Description

Smart glass device using hologram optical element

The present invention relates to a smart glass device used for a virtual experience device, a video game machine, a virtual training system, and the like, and more particularly, to a smart glass device using a hologram optical element (HOE).

Near-eye displays are manufactured in the form of a Head Mounted Display (HMD) or Glass Type Monitor (GTM), and include Virtual Reality (VR), Augmented Reality (AR), and Mixed Reality (MR). It is mainly used for virtual experience devices, video game machines, and virtual training systems that provide smart environments such as reality).

As a kind of optical system applied to the near-eye display as described above, Patent Document 1 discloses an ergonomic head mounted display device and an optical system, and Patent Document 2 discloses an optical system and a head-mounted display device. , Patent Document 3 discloses an optical system for a head-mounted display using an optical waveguide.

As disclosed in Patent Documents 1 to 3, an optical system applied to a conventional near-eye display mainly displays an image using an optical waveguide manufactured in the form of a prism having a predetermined thickness and a three-dimensional structure. Therefore, the optical system is bulky and has a complex structure.

In particular, since an optical waveguide manufactured in the form of a prism can reflect unwanted light input from the surroundings regardless of an optical signal for displaying an image, the conventional near-eye display using the optical waveguide manufactured in the form of a prism There is a disadvantage that the user cannot see the outside clearly or a ghost image due to the above unwanted light reflection is visible. have.

In addition, a virtual experience device that provides a smart environment such as virtual reality (VR), augmented reality (AR), and mixed reality (MR) with the conventional Near Eye Display using an optical waveguide manufactured in the form of a prism, When used in a video game machine, a virtual training system, etc., a phenomenon in which the image displayed through the optical waveguide is distractedly overlapped appears in the eyes of other people who see the user wearing the near-eye display.

KR 10-2015-0054967 A KR 10-2018-0085663 A KR 10-1732880 B1

The present invention is to solve the above-mentioned problems of the prior art, and an object of the present invention is to be manufactured as a see-through type that can acquire an image while securing an external field of view, and to be applied to a hologram optical element (HOE) in advance. The HOE image display unit composed of a wavelength-selective transparent reflector made in the form of a film by recording only a defined wavelength for asymmetric reflection to match the center of the eye is placed in parallel with the eye. Display as a converged image so that it can be enlarged and viewed with the eyes, but the output light of three laser diodes arranged to output red light, green light, and blue light, respectively, is condensed with a collimation taper, and then flat panel light induction Combine to become one point light source at the end along the optical waveguide inside the Plane Lightguide Combiner (PLC), and then through the Collimation Lens, the combined point light source is sized at any distance without an angle of expansion. An object of the present invention is to provide a smart glass device using a holographic optical device using a point light source emitting unit for outputting a constant parallel point light source as a light source for emitting the incident light signal.

In order to achieve the object of the present invention as described above, a smart glass device using a holographic optical device according to the present invention includes a body frame manufactured in a form in which a user can view an image while securing an external view through the HOE image display unit; ; a light source case arranged on both sides connecting the user's eyes and ears of the body frame; a point light source emitting unit accommodated in the light source case and emitting a point light source made of the point image signal when a point image signal for displaying an image on the HOE image display unit is input from the glass device controller; a mirror unit accommodated in the light source case, reflecting the point light source output from the point light source emitting unit and transmitting it to the point light source scanning unit; a point light source scanning unit accommodated in the light source case and emitting an optical signal obtained by scanning a point light source transmitted through the mirror unit to the HOE image display unit to display a plane image on the HOE image display unit; and a wavelength selective transparent reflector manufactured in the form of a film laminated or adhered on an aspherical lens fixed to the frame of the body frame, and has a predetermined wavelength in a hologram optical element (HOE) in a state parallel to the eye. HOE image display unit that records the asymmetrical reflection to fit the center of the eye, enlarges the image indicated by the incident optical signal to a size corresponding to the specified reflection angle, and displays the image as a converged image for viewing with the eyes; Consisting of; It is characterized in that it is manufactured as a see-through type that can display an image while securing it.

In a smart glass device using a holographic optical device according to the present invention, the point light source emitting unit comprises: a laser diode mount for fixing three laser diodes arranged to output red light, green light, and blue light, respectively; a collimation taper that forms a conical structure for condensing each output light output from the three laser diodes; a Plane Lightguide Combiner (PLC) for combining the output light from the three laser diodes, which is output from the three laser diodes and then condensed by the condensing attenuator, into one point light source; and a collimation lens for outputting a single point light source combined by the flat light induction mixer as a parallel point light source having a constant size at any distance without an unfolding angle.

In the smart glass device using the holographic optical element according to the present invention, the laser diode mount is characterized in that it has a heat dissipation function for emitting heat generated during the light-emitting operation of the three laser diodes.

In the smart glass device using the holographic optical element according to the present invention, the light condensing attenuator gradually reduces the distance reflected with respect to each output light output from the three laser diodes, so that the output light is smaller than the cross-sectional area of the initially input light. It is characterized in that it is formed in a conical structure to make the cross-sectional area small.

In the smart glass device using the holographic optical element according to the present invention, the flat-panel optical induction mixer has a structure in which a splitter used for optical communication is arranged in reverse, and the output light from the three laser diodes is converted into one point. It is characterized in that it is merged with a light source.

In the smart glass device using the holographic optical element according to the present invention, the flat light induction mixer has three light input units and three light outputs of the condensing attenuator to which each output light from the three laser diodes is output. It is characterized in that it becomes one point light source at the end along an optical waveguide of a predetermined pattern so as to have the same size as each of the parts and to combine the output light from the three laser diodes into one point light source.

In the smart glass device using the holographic optical element according to the present invention, the condensing lens is installed in a rotating screw method so that the diameter size of the output parallel point light source can be adjusted.

In the smart glass device using the holographic optical device according to the present invention, the mirror unit reflects a first mirror that reflects the point light source output from the point light source emitter and the point light source that is reflected by the first mirror again, It is characterized in that it is configured to include a second mirror that is transmitted to the point light source scan unit.

In the smart glass device using the holographic optical device according to the present invention, the point light source scanning unit is a 2D MEMS (Micro-Electro Mechanical Systems) scanner in which a scanning mirror is located in the center, and is transmitted via the mirror unit A plane image is displayed on the HOE image display unit by emitting an optical signal obtained by intermittently using the scan mirror over time according to a horizontal synchronization signal or vertical synchronization signal that synchronizes a point light source with the point image signal to the HOE image display unit. do.

In the smart glass device using the holographic optical device according to the present invention, the optical signal is disposed on the optical signal emission path between the point light source scanning unit and the HOE image display unit and the optical signal emitted from the point image scanning unit is transmitted to the HOE image display unit. It is characterized in that it further comprises a magnifying lens (Broad lens) for removing the speckle when displayed as a plane image and adjusting the angle at which the plane image is incident on the HOE image display unit.

In the smart glass device using the holographic optical element according to the present invention, a view center corresponding to the center of the plane image displayed on the HOE image display unit and an eye box disposed at a predetermined distance from the HOE image display unit ( The angle between the eye axis corresponding to the central axis of the eye box is maintained at 1 degree (°) so that the optical signal emitted from the dot image scan unit is reflected from the HOE image display unit as a plane image to the eye. It is characterized in that the above-mentioned eye axis coincides with the anterior viewing axis of the eye when converging.

According to the present invention, if the HOE image display unit is composed of a wavelength selective transparent reflector manufactured in the form of a film laminated or adhered on an aspherical lens using a hologram optical element (HOE), the HOE image display unit is a flat lens for HMD or a spectacle type monitor (GTM). ), when used by laminating or adhering to the curved lens, when the user sees the outside through the HOE image display unit, all the light input from the surroundings is transmitted through it and the transparency is increased so that the user can see the outside very clearly.

In the present invention, since an image that is reflected only for a selected wavelength is displayed through the HOE image display unit, all unwanted light due to the ambient lighting environment passes through the HOE image display unit and is not reflected. While eliminating ghost images, you can see very bright and clear images in contrast to the surrounding lighting environment.

According to the present invention, if the HOE image display unit is manufactured in the form of a film, it can be produced by mass copying at a low cost, and can be miniaturized and lightened in comparison with the case of manufacturing it in the form of a lens having the same function, so the HOE image display unit in the film form By using this, near-eye displays such as HMDs and glasses-type monitors (GTMs) can be made smaller and lighter and cheaper.

According to the present invention, a near-eye display such as an HMD or glasses-type monitor (GTM) manufactured by using the HOE image display unit manufactured in the form of a film according to the present invention can be used as a smart display such as virtual reality (VR), augmented reality (AR), mixed reality (MR), etc. When used in a virtual experience device, video game machine, virtual training system, etc. that provide an environment, the image reflected only for the selected wavelength is displayed through the HOE image display unit. It is possible to prevent the phenomenon that the images displayed on the screen are overlapped in a distracting manner.

According to the present invention, the output light of three laser diodes arranged to output red light, green light, and blue light, respectively, passes through the condensing attenuator and then passes along the optical waveguide inside the flat-panel optical induction mixer. light loss can be minimized.

1 is a perspective view showing an embodiment of a smart glass device using a holographic optical device according to the present invention.
Figure 2 is an exploded view showing the internal configuration of the light source case shown in Figure 1;
FIG. 3 is an embodiment for explaining an operation in which the point light source scanning unit shown in FIG. 2 emits an optical signal obtained by scanning the point light source to the HOE image display unit to display a plane image on the HOE image display unit;
4 is an embodiment showing the planar arrangement structure of the point light source scanning unit, the magnifying lens unit, and the HOE image display unit shown in FIG. 2 .

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

The smart glass device using the holographic optical element according to the present invention described below is not limited to the following embodiments, and those with ordinary knowledge in the relevant technical field without departing from the gist of the technology claimed in the claims It has the technical spirit to the extent that anyone can change it and implement it.

1 to 4, the smart glass device 100 using the holographic optical device according to the present invention is manufactured as a see-through type that can display an image while securing the user's external view, and the main body Frame 110 and light source case 120, point light source emitting unit 130, mirror unit 140, point light source scanning unit 150, HOE image display unit 160 and magnifying lens unit 170 is comprised of

The body frame 110 is manufactured in a form (eg, glasses form or goggles form, etc.) in which a user can view an image while securing an external view through the HOE image display unit 160 .

For reference, in FIG. 1 , a rim 112 formed on both sides of a bridge 111 and a temple 113 connecting the user's ear are included, and the rim 112 is provided with an aspherical lens. 114 illustrates the body frame 110 manufactured in the form of fixed glasses.

The light source case 120 is disposed on both sides connecting the user's eye part and the ear part of the body frame 110 , and is preferably disposed close to the eye.

For reference, in Fig. 1, in the body frame 110 made in the form of glasses, the light source case 120 is exemplified near the connection part of the leg 113 connecting the frame 112 and the user's ear to be close to the eye. do.

The point light source emitting unit 130 is accommodated in the light source case 120, and when a point image signal for displaying an image on the HOE image display unit 160 is input from the glass device controller 200, the point image signal is made Emit a point light source.

For reference, the glass apparatus controller 200 generates a point image signal for displaying an image on the HOE image display unit 160 and a horizontal synchronization signal or vertical synchronization signal synchronized with the dot image signal to the point light source emitting unit 130 . 1 illustrates a state in which the glass device controller 200 is connected to the smart glass device 100 using the hologram optical device according to the present invention through a gender 210 .

The point light source emitting unit 130 is configured to include a laser diode mount 131 , a condensing attenuator 132 , a flat light induction mixer 133 , and a condensing lens 134 .

The laser diode mount 131 fixes three laser diodes LD_RED, LD_GREEN, and LD_BLUE that are arranged to output red light, green light, and blue light, respectively.

Preferably, the laser diode mount 131 has a heat dissipation function for dissipating heat generated during the light-emitting operation of the three laser diodes LD_RED, LD_GREEN, and LD_BLUE.

For example, the laser diode mount 131 may dissipate heat transmitted from the three laser diodes LD_RED, LD_GREEN, and LD_BLUE during light-emitting operation through a surface thereof.

The condenser attenuator 132 forms a conical structure for condensing each output light output from the three laser diodes LD_RED, LD_GREEN, and LD_BLUE.

The light condensing attenuator 132 gradually reduces the distance reflected with respect to each output light output from the three laser diodes LD_RED, LD_GREEN, LD_BLUE so that the cross-sectional area of the output light becomes smaller than the cross-sectional area of the initially input light. It is preferably formed in a conical structure (refer to the enlarged cross-sectional view of Fig. 1).

The flat light induction mixer 133 is output from the three laser diodes LD_RED, LD_GREEN, and LD_BLUE and then is focused by the light condenser decimator 132 from the three laser diodes LD_RED, LD_GREEN, and LD_BLUE. Lets the output light merge into one point light source.

The flat-panel optical induction mixer 133 has a structure in which the splitter used for optical communication is arranged in reverse (refer to the enlarged cross-sectional view of FIG. 1), and outputs light from the three laser diodes LD_RED, LD_GREEN, LD_BLUE into one merge into a point light source.

The flat light induction mixer 133 has each of the three light input units each of the three light output units of the condenser attenuator 132 to which the respective output light from the three laser diodes LD_RED, LD_GREEN, and LD_BLUE is output. It becomes one point light source at the end along the optical waveguide of a predetermined pattern so that the output light from the three laser diodes (LD_RED, LD_GREEN, LD_BLUE) is combined into one point light source.

The condensing lens 134 outputs a single point light source combined by the flat light induction mixer 133 as a parallel point light source having a constant size at any distance without an unfolding angle.

The condensing lens 134 may be installed in a rotating screw type so that the diameter size of the output parallel point light source can be adjusted.

The mirror unit 140 is accommodated in the light source case 120 , reflects the point light source output from the point light source emitter 130 and transmits it to the point light source scan unit 150 .

The mirror unit 140 includes a first mirror 141 that reflects a point light source output from the point light source emitting unit 130 and a point light source reflected by the first mirror 141 back to the point light source. It is configured to include a second mirror 142 that transmits to the scan unit 150 .

In the embodiment of the present invention, the mirror unit 140 including the first mirror 141 and the second mirror 143 is exemplified, but the mirror unit 140 includes at least one inside the light source case 120 . By disposing the above mirrors, a point light source reflection path may be formed between the point light source emitter 130 and the point light source scan unit 150 .

The point light source scan unit 150 is accommodated in the light source case 120 , and emits an optical signal obtained by scanning the point light source transmitted through the mirror unit 140 to the HOE image display unit 160 . A surface image is displayed on the image display unit 160 .

The point light source scanning unit 150 is a 2D MEMS (Micro-Electro Mechanical Systems) scanner in which a scanning mirror is located in the center, and the point light source transmitted through the mirror unit 140 is converted to the point image signal. A plane image is displayed on the HOE image display unit 160 by emitting an optical signal obtained by intermittently using the scan mirror over time by a horizontal synchronization signal or vertical synchronization signal synchronized with the HOE image display unit 160 . .

The HOE image display unit 160 is a wavelength selective transparent reflector manufactured in the form of a film laminated or adhered on the aspherical lens 112 fixed to the rim 111 of the body frame 110, and is parallel to the eye. In the arranged state, only a predefined wavelength is recorded on a hologram optical element (HOE) to have asymmetrical reflection that is aligned with the center of the eye, so that the image represented by the incident optical signal is enlarged to a size corresponding to the specified reflection angle and viewed with the eye. It is displayed as a converged image.

The magnifying lens unit 170 is disposed on the optical signal emission path between the point light source scanning unit 150 and the HOE image display unit 160, and the optical signal emitted from the point image scanning unit 150 is the HOE image. When a surface image is displayed on the display unit 160 , a speckle is removed and the angle at which the surface image is incident on the HOE image display unit 160 is adjusted.

In the present invention, as shown in FIG. 4 , a view center corresponding to the center of the plane image displayed on the HOE image display unit 160 and an eye box disposed at a predetermined distance from the HOE image display unit 160 . The optical signal emitted from the point image scanning unit 150 by adjusting the angle formed by the eye axis corresponding to the central axis of the (Eye Box) is reflected from the HOE image display unit 160 as a plane image to the eye When converge to , the above-mentioned Eye Axis coincides with the anterior visual axis of the eye. 4 shows an embodiment in which the above-described angle between the angles is maintained at 1 degree (°).

The smart glass device 100 using the hologram optical device according to the present invention configured as described above operates as follows.

As shown in FIG. 1 , the smart glass device 100 using the holographic optical device according to the present invention is manufactured in a transmissive type that allows a user to acquire an image while securing an external view through the eye retina.

In order to display an image on the HOE image display unit 160 , a point image signal output from the glass apparatus controller 200 electrically connected to the point light source emission unit 130 is applied to the point light source emission unit 130 . Then, the point light source emitting unit 130 emits the point light source made of the corresponding point image signal to the mirror unit 140 .

The point light source emitting operation of the point light source emitting unit 130 will be described in detail as follows.

When the three laser diodes LD_RED, LD_GREEN, and LD_BLUE disposed on the laser diode mount 131 output red light, green light, and blue light, respectively, the light concentrating attenuator 132 controls the three laser diodes LD_RED , LD_GREEN, LD_BLUE) with a cone-shaped structure (see the enlarged cross-sectional view of FIG. 1 ) in which the cross-sectional area of the output light becomes smaller than the cross-sectional area of the initially input light by gradually decreasing the reflected distance for each output light output from the above 3 Each output light output from the laser diodes LD_RED, LD_GREEN, and LD_BLUE is focused.

At this time, the laser diode mount 131 emits heat generated during the light-emitting operation of the three laser diodes LD_RED, LD_GREEN, and LD_BLUE.

As such, when the condensing attenuator 132 condenses each output light output from the three laser diodes LD_RED, LD_GREEN, and LD_BLUE in a conical structure as shown in the enlarged cross-sectional view of FIG. 3 , the three lasers It is possible to reduce light loss compared to condensing each output light output from the diodes LD_RED, LD_GREEN, and LD_BLUE through a lens.

The output light from the three laser diodes (LD_RED, LD_GREEN, LD_BLUE), which is output from the three laser diodes (LD_RED, LD_GREEN, LD_BLUE) and then is condensed by the condenser attenuator 132, is 133) and merged into a single point light source.

At this time, the flat plate optical induction mixer 133 is output from the three laser diodes (LD_RED, LD_GREEN, LD_BLUE) through a structure in which a splitter used for optical communication is arranged in reverse (refer to the enlarged cross-sectional view of FIG. 3 ) Lets the light merge into a single point light source.

In particular, in the planar optical induction mixer 133, in the structure in which the splitter used for optical communication shown in the enlarged cross-sectional view of FIG. 3 is arranged in reverse, each of the three optical input units is connected to the three laser diodes LD_RED, LD_GREEN, and LD_BLUE. has the same size as each of the three light output units of the light concentrator 132 to which each output light of is output, and the output light from the three laser diodes LD_RED, LD_GREEN, and LD_BLUE is a single point light source It becomes a single point light source at the end along the optical waveguide of a predetermined pattern so as to be merged into

One point light source combined by the flat light-guided mixer 133 is output as a parallel point light source having a constant size at any distance without an angle extending through the condensing lens 134 .

At this time, if the position of the condensing lens 134 is changed using the rotation screw method, the parallel point light source output through the condensing lens 134 is emitted with its diameter and size adjusted.

For example, as illustrated in FIG. 4 , the parallel point light source is emitted in the form of a single point having a diameter of about 0.7 mm.

As described above, the point light source emitted to the mirror unit 140 is transmitted to the point light source scan unit 150 via a reflection path by the first mirror 141 and the second mirror 142 .

Subsequently, the point light source scanning unit 150 intercepts the point light source transmitted through the mirror unit 140 to the scan mirror according to time by a horizontal synchronization signal or a vertical synchronization signal synchronizing the point image signal with the point image signal. The obtained optical signal is emitted to the HOE image display unit 160 to display a plane image on the HOE image display unit 160 .

In this case, it is preferable that the central scan mirror of the 2D MEMS scanner has an elliptical shape of 0.7 mm in width and 1 mm in length so as to be suitable for scanning the emitted parallel point light source by making a single point with a diameter of about 0.7 mm.

In addition, the point light source scanning unit 150 uses the scan mirror in the horizontal direction at a frequency determined according to an operation method by resonance, for example, a frequency of 25 kHz or higher for displaying a Full HD level image. It is preferable to scan a parallel point light source and scan the parallel point light source by giving a sawtooth wave or pulse width modulation amplitude change in the vertical direction. If it is repeated, a full-HD image that is generally viewed on a television can be displayed on the HOE image display unit 160 .

In addition, the optical signal scanned by the 2D MEMS scanner of the point light source scanning unit 150 and emitted to the HOE image display unit 160 is reflected according to the moving angle of the scan mirror to maintain a predetermined angle.

When the optical signal maintaining the predetermined angle as described above is incident on the HOE image display unit 160, the HOE image display unit 160 expands the image indicated by the incident optical signal to a size corresponding to the predetermined reflection angle and converges so that the eyes can see it. display in video.

The plane image displayed by the optical signal projected on the HOE image display unit 160 is formed by asymmetrical reflection that aligns only a predefined wavelength to the center of the eye, and converges so that it can be viewed with the eye by expanding it to a size corresponding to the predetermined reflection angle. it's one video

In fact, the plane image displayed on the HOE image display unit 160 is an image reflected by the HOE image display unit 160 and projected on the retina of the eye.

In the embodiment of the present invention that operates as described above, the point light source emitting unit 130 is 45 to 60 degrees with the optical axis incident to the HOE image display unit 160 disposed parallel to the eye (in FIG. 4 ). It is preferably disposed on or on the side of the HOE image display unit 160 in a state inclined at 45 degrees), and in particular, since it can be disposed on the side, while using a minimum space when applied to a spectacle-type monitor (GTM) By designing the rear center of gravity, the weight of the corresponding glasses-type monitor (GTM) is reduced, allowing the wearer to conveniently use it for a long time.

In particular, when the point light source emitting unit 130 is applied to a spectacle-type monitor (GTM) in a state where it is tilted by 50 degrees or more from the optical axis incident to the HOE image display unit 160, the light beam emitted from the 2D MEMS scanner It is preferable to use the magnifying lens unit 170 so that the arc is incident parallel to the HOE image display unit 160 .

4 is an embodiment showing a planar arrangement structure of the point light source scanning unit 150, the magnifying lens unit 170, and the HOE image display unit 160 shown in FIG. 2, and has a diameter of 0.7 through the point light source emission unit 130 The point light source scanning unit 150 scans a point light source made of a single dot of about mm and emits an optical signal obtained by scanning the point light source to the HOE image display unit 160 so that a plane image is displayed on the HOE image display unit 160 . Accordingly, an embodiment in which the image reflected from the HOE image display unit 160 is projected on the retina of the eye is shown.

In Figure 4, the eye box (Eye Box) is a position at which the image reflected from the HOE image display unit 160 is projected on the retina of the eye, the view center (View Center) is displayed on the HOE image display unit 160 It is the center of the plane image, and the eye axis is the central axis of the eye box.

4 exemplifies a planar layout structure in which the angle between the View Center and the Eye Axis formed by the center of the Eye Box is 1 degree (°), The unit of distance display is millimeters (mm).

In the embodiment of the present invention, as shown in FIG. 4 , a view center corresponding to the center of the plane image displayed on the HOE image display unit 160 and a predetermined interval from the HOE image display unit 160 (eg, 25.01) mm), if the angle between the eye axis corresponding to the central axis of the eye box is maintained at 1 degree (°), the optical signal emitted from the point image scanning unit 150 is When the HOE image display unit 160 reflects the plane image and converges to the eye, the above eye axis coincides with the front viewing axis of the eye so that the user does not feel image heterogeneity and the depth of three-dimensional expression is realized. You can make it easy for dizziness and long-term use. On the other hand, if the above-mentioned angle is not maintained at 1 degree (°), the user feels a sense of image heterogeneity, and it is difficult to realize the depth of the three-dimensional expression, which may cause dizziness, which may make it difficult to use for a long time.

As a result of numerical analysis of the brightness of the display image of the spectacle-type monitor (GTM) configured in the planar arrangement structure as shown in FIG. 4 , the three laser diodes LD_RED, LD_GREEN, LD_BLUE of the point light source emitting unit 130 . ), it was confirmed that the brightness of the image viewed by the user through the retina of the eye appeared to be 30% or more by contrasting with 100% of the initial brightness expressed in ).

On the other hand, in the case of configuring a spectacle-type monitor (GTM) with a planar arrangement structure as shown in FIG. 4 , but replacing the HOE image display unit 160 with a display unit using an optical waveguide manufactured in the form of a prism, the display image As a result of measuring the brightness through numerical analysis, the user views through the retina of the eye by contrasting the initial brightness of 100% expressed in the three laser diodes (LD_RED, LD_GREEN, LD_BLUE) of the point light source emitting unit 130 as a standard. It was confirmed that the brightness of the image to be performed was less than 3%.

As can be seen from the above, according to the present invention, when the HOE image display unit 160 is composed of a wavelength selective transparent reflector manufactured in the form of a film laminated or adhered on an aspherical lens using a hologram optical element (HOE), the When the HOE image display unit 160 is laminated or adhered to a flat lens for HMD or a curved lens for a spectacle-type monitor (GTM), when the user sees the outside through the HOE image display unit 160, all of the light input from the periphery is You can see the outside very clearly by making it transparent and increasing the transparency.

In the present invention, since the image that is reflected only for the wavelength selected through the HOE image display unit 160 is displayed, all unwanted light due to the ambient lighting environment passes through the HOE image display unit 160 and is not reflected, so the conventional unwanted light At the same time, you can see a very bright and clear image in contrast to the surrounding lighting environment while eliminating the ghost image caused by light reflection.

According to the present invention, if the HOE image display unit 160 is manufactured in the form of a film, it can be produced by mass copying at a low cost, and can be miniaturized and lightened in comparison with the case of manufacturing it in the form of a lens having the same function, so that the film type If the HOE image display unit 160 is used, a near-eye display such as an HMD or a spectacle-type monitor (GTM) can be reduced in size and weight to be manufactured inexpensively.

Virtual reality (VR), augmented reality (AR), mixed reality (MR) display of near-eye displays such as HMD or glasses-type monitor (GTM) produced using the HOE image display unit 160 produced in the form of a film according to the present invention When used in a virtual experience device, video game machine, virtual training system, etc. that provide a smart environment such as the HOE image display unit 160, the image reflected only for the selected wavelength is displayed. It is possible to prevent a phenomenon in which the image displayed on the HOE image display unit 160 is distractedly overlapped by the eye.

According to the present invention, after the output light of three laser diodes (LD_RED, LD_GREEN, LD_BLUE) arranged to output red light, green light, and blue light, respectively, passes through the condensing attenuator 132, a flat panel light induction mixer 133 The light passing path along the internal optical waveguide is shortened, so that light loss can be minimized.

100: smart glass device using a holographic optical element
110: body frame 111: nose bridge
112: frame 113: temple of spectacles
114: aspherical lens 120: light source case
130: point light source emitting unit 131: laser diode mount
132: light condensing attenuator 133: flat plate light induction mixer
134: condensing lens 140: mirror unit
141: first mirror 142: second mirror
150: point light source scan unit 160: HOE image display unit
170: magnifying lens unit 200: glass device controller
210: coupler
LD_RED, LD_GREEN, LD_BLUE: laser diode

Claims (11)

a body frame 110 manufactured in such a way that a user can view an image while securing an external view through the HOE image display unit 160;
a light source case 120 disposed on both sides of the body frame 110 that connects the user's eyes and ears;
A point light source emitting unit accommodated in the light source case 120 and emitting a point light source made of the point image signal when a point image signal for displaying an image on the HOE image display unit 160 is input from the glass apparatus controller 200 (130);
a mirror unit (140) accommodated in the light source case (120), reflecting the point light source output from the point light source emitting unit (130) and transmitting it to the point light source scanning unit (150);
A plane image is displayed on the HOE image display unit 160 by emitting an optical signal obtained by scanning a point light source accommodated in the light source case 120 and transmitted via the mirror unit 140 to the HOE image display unit 160 . a point light source scanning unit 150 to be displayed; and
It is a wavelength selective transparent reflector manufactured in the form of a film laminated or adhered on the aspherical lens 114 fixed to the rim 112 of the body frame 110, and a hologram optical element ( HOE image that records only a predefined wavelength in a hologram optical element (HOE) to have asymmetrical reflection that matches the center of the eye, enlarges the image represented by the incident optical signal to a size corresponding to the specified reflection angle, and displays it as a converged image so that the eyes can see it display unit 160;
is composed of,
It is characterized in that it is manufactured as a see-through type that allows a user to display an image while securing an external view through the HOE image display unit 160,
The point light source emitting unit 130 is
a laser diode mount 131 for fixing three laser diodes LD_RED, LD_GREEN, and LD_BLUE that is arranged to output red light, green light, and blue light, respectively;
a collimation taper 132 forming a conical structure for condensing each output light output from the three laser diodes LD_RED, LD_GREEN, LD_BLUE;
The output light from the three laser diodes LD_RED, LD_GREEN, and LD_BLUE, which is output from the three laser diodes LD_RED, LD_GREEN, and LD_BLUE, and then is focused by the light concentrator 132 is combined into one point light source. a Plane Lightguide Combiner (PLC) 133; and
a collimation lens 134 for outputting a single point light source combined by the flat light induction mixer 133 as a parallel point light source having a constant size at any distance without an unfolding angle;
is composed of
The flat light induction mixer 133 has a structure in which a splitter used for optical communication is arranged in reverse, so that the output light from the three laser diodes (LD_RED, LD_GREEN, LD_BLUE) is combined into one point light source. characterized by,
The condensing lens 134 is a smart glass device using a holographic optical device, characterized in that it is installed in a rotating screw method so that the diameter size of the output parallel point light source can be adjusted. delete According to claim 1, wherein the laser diode mount 131 has a heat dissipation function for emitting heat generated during the light-emitting operation of the three laser diodes (LD_RED, LD_GREEN, LD_BLUE) using a holographic optical element smart glass device. According to claim 1, wherein the condensing attenuator 132 is output from the cross-sectional area of the initially input light by gradually reducing the distance reflected with respect to each output light output from the three laser diodes (LD_RED, LD_GREEN, LD_BLUE) A smart glass device using a holographic optical device, characterized in that it is formed in a cone-shaped structure that makes the cross-sectional area of the light smaller. delete According to claim 1, wherein the flat light induction mixer (133) of the light condensing attenuator (132), each of the three light input units is output light from each of the three laser diodes (LD_RED, LD_GREEN, LD_BLUE) One point at the end along the optical waveguide of a pattern that is the same size as each of the three light output units and has a pattern so that the output light from the three laser diodes (LD_RED, LD_GREEN, LD_BLUE) is combined into one point light source A smart glass device using a hologram optical element, characterized in that it becomes a light source. delete According to claim 1, wherein the mirror unit 140 comprises a first mirror (141) that reflects the point light source output from the point light source emitter (130) and the point light source reflected by the first mirror (141) A smart glass device using a holographic optical device, characterized in that it comprises a second mirror (142) that is reflected back and transmitted to the point light source scanning unit (150). According to claim 1, wherein the point light source scanning unit 150 is a 2D MEMS (Micro-Electro Mechanical Systems; micro-electro-mechanical systems) scanner in which a scanning mirror is located in the center, and the point is transmitted via the mirror unit (140). The HOE image display unit 160 by emitting an optical signal obtained by intermittently using the scan mirror over time by a horizontal synchronization signal or vertical synchronization signal synchronizing a light source with the point image signal to the HOE image display unit 160 A smart glass device using a holographic optical element, characterized in that it displays a plane image. The HOE image display unit ( 160) to remove speckle when displayed as a plane image and further comprising a magnifying lens unit 170 for adjusting the angle at which the plane image is incident on the HOE image display unit 160 A smart glass device using a holographic optical element, characterized in that it becomes According to claim 1, wherein a view center (View Center) corresponding to the center of the plane image displayed on the HOE image display unit 160, and the HOE image display unit 160, the eye box (Eye Box) disposed apart from the predetermined interval When the optical signal emitted from the point light source scan unit 150 is reflected from the HOE image display unit 160 as a plane image and converges to the eye by adjusting the angle formed by the eye axis corresponding to the central axis of the A smart glass device using a holographic optical device, characterized in that the eye axis coincides with the front viewing axis of the eye.

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